Periodic Table/Helium/⁵He

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⁵He

Helium-5

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

2

Neutrons (N)

3

Mass Number (A)

5

Atomic Mass

5.012057AMU

Spin / Parity

3/2-

Binding E/A

5.308keV

Natural Abundance

Trace / None

Half-life

Unknown

Decay Modesoverview · half-life · α · β⁻ · β⁺

n

100.0%

Decay Chain

n100.0%

⁴HeHeliumSTABLE

2-step decay chain → stable · Primary path shown

Other Isotopes of Helium

3 4 5 6 7 8 9 10

← Back to HeliumData: IAEA NDS · ENSDF